Made-to-measure galaxy models - III Modelling with Milky Way observations

Abstract

We demonstrate how the Syer & Tremaine made-to-measure method of stellar dynamical modelling can be adapted to model a rotating galactic bar. We validate our made-to-measure changes using observations constructed from the existing Shen et al. (2010) N-body model of the Milky Way bar, together with kinematic observations of the Milky Way bulge and bar taken by the Bulge Radial Velocity Assay (BRAVA). Our results for a combined determination of the bar angle and bar pattern speed (~30 degrees and ~40 km/s/kpc) are consistent with those determined by the N-body model. Whilst the made-to-measure techniques we have developed are applied using a particular N-body model and observational data set, they are in fact general and could be applied to other Milky Way modelling scenarios utilising different N-body models and data sets. Additionally, we use the exercise as a vehicle for illustrating how N-body and made-to-measure methods might be combined into a more effective method.

Accepted for publication, 10 pages, 7 figures

References in corpus (7)

• Dynamics of Barred Galaxies
• NMAGIC: Fast Parallel Implementation of a Chi-Squared-Made-to-Measure Algorithm for Modelling Observational Data
• The Bulge Radial Velocity Assay (BRAVA): I. Techniques and a Rotation Curve
• The Bulge Radial Velocity Assay (BRAVA): I. Sample Selection and a Rotation Curve
• Dark matter content and internal dynamics of NGC 4697: NMAGIC particle models from slit data and planetary nebulae velocities
• Proper Motion Dispersions of Red Clump Giants in the Galactic Bulge: Observations and Model Comparisons
• A resonant feature near the Perseus arm revealed by red clump stars

Cited by in corpus (42)

• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
• A New Photometric Model of the Galactic Bar using Red Clump Giants
• Internal kinematics and dynamical models of dwarf spheroidal galaxies around the Milky Way
• Orbital decomposition of CALIFA spiral galaxies
• The signatures of the resonances of a large Galactic bar in local velocity space
• Kinematics of massive star ejecta in the Milky Way as traced by 26Al
• SDSS-IV MaNGA: pattern speeds of barred galaxies
• Identifying resonances of the Galactic bar in Gaia DR2: I. Clues from action space
• Chemodynamical Modelling of the Galactic Bulge and Bar
• The Next Generation Virgo cluster Survey. V. modelling the dynamics of M87 with the Made-to-Measure method
• The Bar and Spiral Arms in the Milky Way: Structure and Kinematics
• Elliptical galaxies with rapidly decreasing velocity dispersion profiles: NMAGIC models and dark halo parameter estimates for NGC 4494
• Staying away from the bar: the local dynamical signature of slow and fast bars in the Milky Way
• Dynamics for Galactic Archaeology
• A Schwarzschild model of the Galactic bar with initial density from N-body simulations
• Applying Schwarzschild's orbit superposition method to barred or non-barred disc galaxies
• The peculiar in-plane velocities in the outer disc of the Milky Way
• The peculiar velocities in the Galactic outer disk--hints of the elliptical disk and the perturbation of the spiral structures
• The stellar kinematics in the solar neighborhood from LAMOST data
• M2M modelling of the Galactic disc via PRIMAL: Fitting to Gaia Error Added Data
• Kinematics of the X-shaped Milky Way Bulge: Expectations from a Self-consistent N-body Model
• Chemodynamical signatures of bar resonances in the Galactic disk: current data and future prospects
• Orbit-Superposition Dynamical Modeling of Barred Galaxies
• Investigating Bar Structure of Disc Galaxies via PRIMAL: A PaRtIcle-by-particle M2M ALgorithm
• Theoretical Models of the Galactic Bulge
• GalMod: a Galactic synthesis population model
• Self-consistent triaxial models
• The velocity distribution in the solar neighbourhood from the LAMOST pilot survey
• Torus Models of the Outer Disc of the Milky Way using LAMOST Survey Data
• Differential rotation of the halo traced by the K-giant stars
• Made-to-measure galaxy modelling utilising absorption line strength data
• Basis function expansions for galactic dynamics: Spherical versus cylindrical coordinates
• Made-To-Measure Models of Self-Similar Triaxial Halos with Steep Inner Density Gradients
• Orbit properties of massive prolate galaxies in the Illustris simulation
• Made-to-Measure Modelling of Globular Clusters
• Uncover 3D Dark Matter Distribution of the Milky Way by an Empirical Triaxial Orbit-Superposition Model: Method Validation
• Schwarzschild modeling of barred galaxies
• Satellite Infall and Mass Deposition on the Galactic Centre
• Dynamical Models of the Milky Way in Action Space with LAMOST DR8 and GAIA EDR3
• Deprojection of external barred galaxies from photometry